1914] GROOM—TRACHEID-CALIBER 207 
TABLE III 
WIDTH OF — 
TRACHEIDS IN 
DISTRIBUTION, SOIL, ALTITUDE, ETC. 
Atlantic BS rscwo Pacific 
Torreya— 
pecaiiorica.....|......./...... 3 California, 3000-5000 ft., moist soil near 
aes streams; subtropica 
T. taxifolia...... BOL be ee oy W. Filo rida, moist soil; moderately 
warm. 
Sequoia— 
. gigantea ...... ean ere ee 39 | Warm tempera 
Sai 2S eg Were ae 55 Very moist soil: sil moist air; subtropi- 
cal 
2 
Secret 
pawnoniana....|,.<...|...... 15 1S. = oe = Dyer moist soil; 
C. nutkaensi mgiigs = 
. RS rile es vcs fema ess 25.5 Alaska to Britis hn Columbia, Cascade 
Mts.; adapted to the moistest ~ and 
a oes rainfall = Lawsoniana; 
C. thyoid cool tem 
poes... ... Gel Cate aebails Dieses tee Maine t to N Florida: A vali swamps. 
c us— 
Peeteohica....  [ ee ae prey Sonora, Chihuahua, 3000- 
o ft. 
\ Macnabiana....|.... |. ..... 3 california, dry hills and low slopes; sub- 
Peortiana...../......|...... 32 aiforsia coast up to 3000 ft., hot rocky 
ee often on banks of streams; 
C, macroca: — 
5: gup hed ane eee ree 39 California, — of Monterey Bay, ex- 
posed constantly to the sea breezes 
sahttoical 
J. sabinoides..... |... pt Oe Gere Texas to Mexico; up to the limits of 
hin epee on high sndircesbs in Cen- 
pana ral guage 
oe: ee eee ee eee pe o New York and Utah. 
iy SS ee 18 Sotamans River to Lower California; 
dry tain slopes, — of 
‘ Tehachapi Mts.; su ica! 
J occidentalis.....|....0.)... 2. 18 | 6000-10, oo ft, rocky ridges of Blue 
Mts., where it is a b on t 
ridges; cool temperate. : 
J. monosperma....|... Te eee ae Ro ie Mts. to Arizona _ Mexico, 
: 3500-7000 ft., Oe ot Ca : 
J-communis,.....|....0 |... 20.5} Greenland to mountains of California 
and Arizona. 
J Pachyphlaea....|...... OTe S.W. Texas to desert ranges of Arizona, 
4000-6000 ft., arid mountain slopes: 
. Sas subtropical. 
J Sabina... . |. a%.5 Nova Scotia to Bony? Mts. and Mon- 
 e tana; slopes and ri 
